Introduction

Body functions are controlled and regulated by two neuro endocrine system, nervous and endocrine.

Nervous regulation is very fast, taking only milliseconds and limited to only a part of target. Hormonal regulation is a bit slower but influence all the sensitive cells of target tissue.

Nervous system is also known to stimulate endocrine system.

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Endocrine system is a system of isolated glands that pour their secretions directly into venous blood or lymph for passage to different body organs in order to control their functioning, metabolism, cell permeability growth, differentiation and stress conditions. Endocrine system comprises endocrine glands and their hormones. The branch of science that is connected with the study of endocrine glands, hormones and their effects is known as endocrinology.